Malicious PDF — malware analysis report

Static analysis result for SHA-256 410feec6506a2e02…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 17:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179cfc0520a7f8f26cbab1828556e416 SHA-1: 650a0d4d007076bfec07301e5a596d6984837f8f SHA-256: 410feec6506a2e024c66075f9310d92fce7e9b24054a9f277b572a266c17e29e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and at least one known malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=acrylic+sheet+spanish, which is likely used to redirect users to further malicious content. The document body is heavily obfuscated but contains references to the malicious URL and other Shopify links, suggesting a lure to drive traffic to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=acrylic+sheet+spanish
    • http://files.jlhopewindsofpoetry.com/uploads/1/3/0/9/130969695/girizebu-gatolid.pdf
    • http://matudibup.ldmsmedia.com/uploads/1/3/1/4/131438500/a2ef282c70ab3c5.pdf
    • http://lodipot.taylorsmithhams.com/uploads/1/3/0/8/130874198/zoberexofiwuvur_mowidolamelu_zofitidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevaziretojigadogikoranab.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/zesibekegapagixesumuvida.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/tusikutagedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/87374210453.pdf
    • https://cdn.shopify.com/s/files/1/0440/0221/4046/files/infosys_bpo_aptitude_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/tenafeguwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/25859263846.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/desigef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/cinnamon_girl_tab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/37881215991.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/selection_sort_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/82257694596.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000663e.bin
03439184d8f3169367236bd9565b2fde313d4c41cdbe137aab5c335c0562d87b
pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 5112 bytes
font_01_sfnt_off0000779c.bin
dea09db767d114c38de3359e671cd8cd98cc3f781bf5a5d3e7b1c7b51fbd1623
pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 10072 bytes